The Declaration of Independence is one of the most important documents in the history of the United States. It marked an official step taken by the American colonies toward independence from British rule. Many colonists were unhappy with laws that collected taxes but did not give them a say in government. The Stamp Act of 1765, for example, collected taxes on items made of paper such as legal documents, newspapers, and even playing cards. The Townshend Acts of 1767 were a series of acts that involved taxing the colonies to raise revenue for Great Britain. The Boston Tea Party in 1773, when men boarded a ship full of British tea and dumped it into Boston Harbor, was a protest against taxation without representation. The discontent of the colonists, such as the colonial lack of participation in government, led to war with Great Britain.